L64733C LSI Logic Corporation, L64733C Datasheet - Page 2

• Manufacturer Part Number: L64733C
• Description: Tuner And Satellite Receiver Chipset Data Sheet 2/01
• Manufacturer: LSI Logic Corporation

2
L64733C and generates dual automatic gain control (AGC) voltages for
the two-stage automatic gain control on the L64733C. A simplified
chipset block diagram is shown in Figure 2.
Figure 2
Figure 3 shows a more detailed chipset block diagram.
The L64733C accepts the RF In L-Band signal input from the satellite
low noise block (LNB) feed. The L64733C handles a fully loaded raster
of transponder signals from 925 MHz to 2175 MHz. RF In is internally
matched to 75
connector and the L64733C input pins, except for a DC-blocking
capacitor. The L64733C uses the L64734 INSEL signal to select the
appropriate RF function (Normal or Loop-Through Mode).
L64733C/L64734 Tuner and Satellite Receiver Chipset
Microcontroller
RF Output
RF Input
Host
Select
L64733C/734 Simplified Block Diagram
; it requires no matching network between the cable
Control Signals
Switch
RF
Microcontroller
Synthesizer
Modules for
and Filter
Conversion
Interface
Control
Down
Mixer,
IOUT QOUT
MPEG Output
Demodulator
Descrambler
Correction
Baseband
Dual ADC
Filter
Error
L64733C
L64734